package jdk.collection.concurrent;

import java.util.Collections;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;

public class ConcurrentHashMapDemo {

    public static void main(String[] args) {
        ConcurrentHashMap<String, String> map = new ConcurrentHashMap();

        map.put("name", "luobinjie");


        Collections.synchronizedMap(new HashMap<>());
    }
}
